Castillo struggled against the Cincinnati Reds, going just 4.1 innings and giving up six earned runs. Unfortunately, this ...

In addition to the starting duo, the M's also have another Julio Rodríguez in the organization "We are duplicating names left ...

According to a report from Bob Nightengale of USA Today, the M's were offered a young infielder for Castillo, but said no.

Seattle Mariners starting pitcher Luis Castillo surfaced in MLB rumors this winter when the clubs fielded inquiries on the ...

Austin Hays drove in four runs in his season debut, and the Cincinnati Reds beat Luis Castillo and the Seattle Mariners 8-4.

The Mariners have reportedly made pitcher Luis Castillo "off limits" in trade talks. "One club who offered a young infielder ...

Troy Taylor was thought to be one of the solutions in the bullpen for Seattle, but he's headed back to Triple-A Tacoma.

"I spent five years here, and being able to pitch here on that mound again was special," Castillo said Tuesday night.

Seattle is looking to upgrade its lineup, but is not currently interested in trading from its vaunted rotation to do so. Read ...

The Mariners begin a road trip with a defeat in Cincinnati, snapping Seattle's four-game winning streak despite two home runs ...

The Seattle Mariners are in the middle of their best stretch of baseball this year. They're 7-2 in their last nine games and have won or swept three series in a ...

The Seattle Mariners are giving their No. 6 starting pitcher another shot in the major leagues in a critical rubber match ...